crypto: qce50: Init sg don't just add pages to it

Make change to init sg in setup_dummy_req, which was not
initialized and could prevent the kernel from booting
up with debug flags enabled.

Change-Id: Ida47dac6bef492d248e9429f36b06ad920bdfeba
Signed-off-by: Scott Bauer <sbauer@plzdonthack.me>
Git-Commit: fd82bd4f9bbf6aa6e0cf55f5263ee0d851466c7a
Git-Repo: https://github.com/CopperheadOS/kernel_google_wahoo.git


Signed-off-by: Zhen Kong <zkong@codeaurora.org>